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Physics and Chemistry of the Earth, 1975
Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
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Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
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A Phreatomagmatic Kimberlite: The A418 Kimberlite Pipe, Northwest Territories, Canada
2013The A418 kimberlite pipe, Northwest Territories, Canada, has a typical downward tapering morphology, has been explored to a depth of ~600 m where the pipe has a diameter of ~50 m, and is infilled by volcaniclastic deposits. The pipe-filling volcanic succession has a minimum volume of ~6 × 106 m3 and comprises structurally diverse deposits including ...
Lucy Anne Porritt +4 more
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Underground Mining of Kimberlite Pipes under Alluvia
Journal of Mining Science, 2001The scheme is proposed for underground mining of kimberlite pipe under alluvia 80-100 m in thickness. The main features of the technology are the refusal to carry out filling operations and use ore vibration discharge ensuring its simultaneous flow over the pipe cross-section.
V. I. Klishin +4 more
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RB–SR AGE DETERMINATIONS ON SOUTH AFRICAN KIMBERLITE PIPES
Physics and Chemistry of the Earth, 1975Abstract A study has been made to establish to what extent reliable age-measurements can be obtained by the RbSr isochron method on phlogopite micas from kimberlite and its associated inclusions. Essentially linear isochrons were usually obtained for the micas when grouped according to their source.
H.L. Allsopp, D.R. Barrett
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Bitumens in the Mir Kimberlite Pipe (Yakutia)
Geochemistry InternationalSolid bitumen in the Mir kimberlite pipe form vein-like segregations several centimeters in size. They are distributed irregularly in the pipe body, regardless of the kimberlite breccia varieties distribution. Bitumen content in kimberlites ranges from 0.001 wt% to 0.12 wt%.
F. V. Kaminsky +3 more
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Young peridotitic diamonds from the Mir kimberlite pipe
Nature, 1995MINERAL inclusions in diamonds contained in the explosive volcanic rocks known as kimberlites provide an important record of geochemical processes in the continental lithosphere. Samarium–neodymium model ages as old as 3.2 Gyr have been obtained for many peridotitic mineral inclusions1–4, pointing to the great antiquity of the host 'peridotitic ...
N. Shimizu, N. V. Sobolev
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Seismic methods for the detection of kimberlite pipes
Exploration Geophysics, 1998The results of a seismic experiment conducted in Northern Territory over known kimberlite pipes are shown.
Milovan Urosevic, Brian J. Evans
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On the geological-prospecting types of kimberlite pipes
Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences, 2023The conducted research on geological structure and material composition of the Siberian platform kimberlites indicated the complexity and diversity of geologic-tectonic and paleogeographic conditions which should be considered when performing the prediction-prospecting works for diamonds in every particular region.
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Improvements in Search Techniques to Detect Kimberlite Pipes
81st EAGE Conference and Exhibition 2019, 2019Summary A review is made of traditional methods that have proven popular in aiding exploration for diamonds. Simple pattern recognition technique can be used to locate kimberlite pipes that have a magnetic response. Gravity tensor gradients have also started to be used.
D. FitzGerald, T. Meyer
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XENOLITHS OF HORNBLENDITES FROM THE UDACHNAYA KIMBERLITE PIPE
Russian Geology and Geophysics, 1995Based on study of structural characteristics of mineralogy and chemistry of hornblendite xenoliths from the Udachnaya Kimberlite Pipe, we have recognized pyroxene, pyroxene-plagioclase, monomineral, and mica varieties. The reaction relationships of amphibole with relict pyroxene suggest metasomatic nature of hornblendites.
A. A. Lunegov, A. I. Kiselev
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